There was an old man in his 70’s that was let out of prison in Oklahoma. He got a job delivering newspapers. He would carefully study some of the homes and if he thought it was a single elderly woman living alone after a couple of months he would deliberately withhold the newspapers from her address. After a few days the women would call the newspaper office about it and give him the message. He would then bring the newspapers to the women’s homes, ring the doorbell and apologize for the missed papers. He would ask to step inside to “explain” what happened. Then he would drag the women to the bathroom, smother them, fill the tub full of water and hold them under the water to make sure they were dead. The police said there were likely 3 women he did that to and maybe four. Some of the deaths were written off as drownings.